Cheap Tweets Cost Big Bucks

With $200 billion temporarily erased on a bogus Twitter feed, no wonder the public is wary of stocks.

That's what I was told when I arrived at Dow Jones three decades ago by the crusty, veteran newsman in charge of the newswires. I was still a relative neophyte even though I already had eight years' experience in financial journalism, but now I was in the big leagues after toiling those years in the minors, and the standards and demands were on a different plane. Too much was on the...